Renogy Drifter - 10000mAh Battery Charger w/ Dual USB Ports Compatible with most USB charged devices (e.g. mobile phones and small electronic devices). Features LCD display that indicates chargers remaining battery percentage. A Micro USB to USB charging cable comes included with purchase. Can also be charged with a 14W E-Flex Solar Panel Charger for maximum portability. Protects against over-charging, or-discharging, overvoltage, overcurrent, and short circuit.